Received: by 2002:a05:6358:489b:b0:bb:da1:e618 with SMTP id x27csp4005850rwn; Sun, 11 Sep 2022 03:08:10 -0700 (PDT) X-Google-Smtp-Source: AA6agR4amH3+20T73Hnqu9k1O0FVqCM1MUV6u9fQGHhTEb2xbuk+8B3fll76KdHytbsmtT0SJRNK X-Received: by 2002:a63:82c7:0:b0:437:3427:44c4 with SMTP id w190-20020a6382c7000000b00437342744c4mr13630206pgd.103.1662890889816; Sun, 11 Sep 2022 03:08:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1662890889; cv=none; d=google.com; s=arc-20160816; b=x6TD9fAAtsXY+uwzJvfrMQZ/k/jvEPfnBvisNIpXwK0vAliNIpD0S+L/pnXKjteW0I BlVDjxS4zAIgJyoZBxmFChIhpHK2MYe8C0w0UolA326nivpwAjAu/HHZr+HLRACQFQye LD7UADh7QNHgIBvfiJrGG8/1aO2YSNOb9QtXwbNlVv8BWDVsjj4qATmF3pTTjOxc+iTd LDBkRIvLGsDH5flaSW3bUoAb9s0SffRSA5J+HPgKv11L48g1T7yHsjnAKEOKKQ3LgJSQ XTrFo/5Cb46REv7qLXylNHF6zeQSFeCvfD6BbtsJtwux8xq4v+rJ1j/IuNcai48Ubaec G0jg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:to:from:dkim-signature; bh=05QawunNkBTDZNRfoCgb3ddj6vEbyg8mxMOwfq8BU7w=; b=dhOEvo4qy8WhDu1u6B3bpCegcvqv28mj1nZVGyHtCeeYusZvSWvlaeTKkMmfad1i54 JaZE5dmQylC5DIXmtOW2VfurSnnrrVMIabUqQvZNWbSk5bPWzGjByqZsxPEXOuNs7rdB Omfi1K0lCQAKZXE6b3opmt9KrS4g/oTOtBCYKKtsoAftWWOtuXjYjHyHH3z6O1DMZBWP WI9m8JZ5MzGmjLLuwvn05INs9P0V0CQDvs1jkdsfE+a0dRq1V7vGL81v7Uz0KaPegIjx ZKQWEh0zCYx1yYS2vPAbQW2hpeApBN11MMjgtfig3TRHP2YptXB8BlGI51+Dv5p0mR+s Kvag== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@soleen.com header.s=google header.b=FITg0qC1; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e2-20020a170902cf4200b001743c571718si5966979plg.177.2022.09.11.03.07.57; Sun, 11 Sep 2022 03:08:09 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@soleen.com header.s=google header.b=FITg0qC1; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229989AbiIKJ7l (ORCPT + 99 others); Sun, 11 Sep 2022 05:59:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229733AbiIKJ7i (ORCPT ); Sun, 11 Sep 2022 05:59:38 -0400 Received: from mail-qk1-x72a.google.com (mail-qk1-x72a.google.com [IPv6:2607:f8b0:4864:20::72a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D96D1111 for ; Sun, 11 Sep 2022 02:59:30 -0700 (PDT) Received: by mail-qk1-x72a.google.com with SMTP id k12so4212513qkj.8 for ; Sun, 11 Sep 2022 02:59:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date; bh=05QawunNkBTDZNRfoCgb3ddj6vEbyg8mxMOwfq8BU7w=; b=FITg0qC1SJ9aTWSShCLy+0XEwLiqqzm16acwEyJX+XAOfrkrL3gQKFBN6iNFjhoHZG EYZSqPwq89StyoiXOzPi38OdVfen6Kch8+/0qdeqz32WP9rIf/YfnNlK9jiEjdznFivN AWmO7rucIghTBighws2gKH3KXmkj8HoMUlZFBEiOrRJ3AiTCYs9aOifMWtWN6LwtdZ9Q gvQ28/d6rSLqSZWi9KMMqD5dqriCMSBexYGH4bchWXrRUAM6shbXX1zRtugVZ+iidlYX OtB+AesCotlHvIHNl28PHVO62PQklu7/96OO8IaLxQocXyu9UWL4GRPuzYDaYlM5l80F PvLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date; bh=05QawunNkBTDZNRfoCgb3ddj6vEbyg8mxMOwfq8BU7w=; b=Wu71RQIU4zN8rFqPpMtdAHzRbXdZbwwLqH/Np+tLeQCKcUsonba+axMNdpfIdSwgCB uehKdB8Uzc5JFJHoIlq+xV6vwvs2Tp+DKaLXtg5BESxbCsdHBXbEo2aIjDzmNs5qrEB0 tCbbvElabF4UCnFosE0gP7HUTydoCPIaQdYVUQDHem6ibNwXkG4xJgwsg+IptUE59Ccb eRS0vmlZTTDIDsXzJcjcrKsxdBUWarvwnENDjgqLkUb4EIu8lC1Imh7EkP98CUhywm96 0hCk7WE6xnMwRxf17xCl/joN76+E7O5z8KJ4r9D+99M3rIDfSNFi8ogpwxnSTt5dLKgb BFuA== X-Gm-Message-State: ACgBeo0rM7v/7nWZlBp+JiZsrQ5WWzPfvLMEM2+U0LQyKbPQf5ZC7svk DtCXpU7LpDu4AXQAYt5amFWwrw== X-Received: by 2002:a05:620a:144b:b0:6cd:5fc9:372 with SMTP id i11-20020a05620a144b00b006cd5fc90372mr7364483qkl.452.1662890368474; Sun, 11 Sep 2022 02:59:28 -0700 (PDT) Received: from soleen.c.googlers.com.com (240.157.150.34.bc.googleusercontent.com. [34.150.157.240]) by smtp.gmail.com with ESMTPSA id y29-20020a37f61d000000b006cbd60c14c9sm4625233qkj.35.2022.09.11.02.59.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Sep 2022 02:59:27 -0700 (PDT) From: Pasha Tatashin To: pasha.tatashin@soleen.com, akpm@linux-foundation.org, corbet@lwn.net, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, rick.p.edgecombe@intel.com Subject: [PATCH 0/3] page table check default to warn instead of panic Date: Sun, 11 Sep 2022 09:59:20 +0000 Message-Id: <20220911095923.3614387-1-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pasha Tatashin Page table check when detects errors panics the kernel. Let instead, print a warning, and panic only when specifically requested via kernel parameter: page_table_check=panic The discussion about using panic vs. warn is here: https://lore.kernel.org/linux-mm/20220902232732.12358-1-rick.p.edgecombe@intel.com Pasha Tatashin (2): mm/page_table_check: Do WARN_ON instead of BUG_ON by default doc/vm: add information about page_table_check=panic Rick Edgecombe (1): mm/page_table_check: Check writable zero page in page table check Documentation/mm/page_table_check.rst | 16 ++++---- mm/page_table_check.c | 53 ++++++++++++++++++++------- 2 files changed, 49 insertions(+), 20 deletions(-) -- 2.37.2.789.g6183377224-goog